title: Ultrathin, molecular-sieving graphene oxide membranes for selective hydrogen separation.
abstract: Ultrathin, molecular-sieving membranes have great potential to realize high-flux, high-selectivity mixture separation at low energy cost. Current microporous membranes [pore size < 1 nanometer (nm)], however, are usually relatively thick. With the use of current membrane materials and techniques, it is difficult to prepare microporous membranes thinner than 20 nm without introducing extra defects. Here, we report ultrathin graphene oxide (GO) membranes, with thickness approaching 1.8 nm, prepared by a facile filtration process. These membranes showed mixture separation selectivities as high as 3400 and 900 for H2/CO2 and H2/N2 mixtures, respectively, through selective structural defects on GO.
authors.affiliation: Department of Chemical Engineering, University of South Carolina, Columbia, SC 29208, USA.
authors.forename: Hang
authors.initials: H
authors.lastname: Li
authors.forename: Zhuonan
authors.initials: Z
authors.lastname: Song
authors.forename: Xiaojie
authors.initials: X
authors.lastname: Zhang
authors.forename: Yi
authors.initials: Y
authors.lastname: Huang
authors.forename: Shiguang
authors.initials: S
authors.lastname: Li
authors.forename: Yating
authors.initials: Y
authors.lastname: Mao
authors.forename: Harry J
authors.initials: HJ
authors.lastname: Ploehn
authors.forename: Yu
authors.initials: Y
authors.lastname: Bao
authors.forename: Miao
authors.initials: M
authors.lastname: Yu